彩色金相技术在焊接金相中的应用

Some Applications of Tint Etching Technique in Metallographical Studies on Welded Joint

采用彩色金相的方法研究了焊接接头金相组织,通过对普通低合金钢,奥氏体/铁素体异种钢焊接接头的研究表明,用彩色金相方法可以很清晰地显示黑白金相无法显示的组织。无论是对焊缝还是对热影响区组织,用彩色金相方法显示,都可以提高组织衬度及分辨率。彩色金相分析技术有助于焊接接头组织的研究,很值得推广。

Tint etching technique was used to reveal the microstructure of the fusion zone of the welded joint,specifically to reveal the fusion zone of ferritic-austenitic dissimilar metal joint.It is known that the researches on the fusion zone of the F/A dissimilar metal have been done since 1940's,but because of the unsuitable etching method and the mismatch of the chemical compositions between the two kinds of metals the structure in the fusion zone were not clear,this region was often called 'light etching region'.The tint etching technique has exellent advantage of revealling the structures in this region.By elaborating the tint etching agent the structures of the fusion zone were claarly shown.It can also increase the distinguishability and contrast in revealling the structures of low alloy steel welded joint.